This paper studies the effectiveness of TOEIC preparation courses for technical college students. The aim of this study is twofold. The first one is to learn if the TOEIC preparation courses help technical college students in the TOEIC exam. The other is to discuss the factors and variables affecting technical college students' TOEIC scores. A total of 60 technical college students in northern Taiwan were included in this study. Students were divided into two classes and both classes received 10-week, 60-hour TOEIC preparation courses. TOEIC scores before and after this preparation program were compared to study the improvement. A student satisfactory survey was also implemented to gather students' opinions for this program. Finally, this paper concludes with suggestions and recommendations for the future course design.